Hello Mr. Mower. Thank you for taking the time to share your detailed feedback. We are sorry to hear that your mowing experience has been frustrating. Thick or damp grass can sometimes cause the mower to work harder, which may lead to clumping or bogging, especially without a side discharge option. Runtime can also vary depending on grass conditions, cutting height, and terrain. The self-propelled system is designed to engage smoothly, so the jerking or difficulty when pulling back is not the experience we want for our customers. We will be sure to share your feedback with our product team, and if you have not already, we encourage you to connect with our customer care team so they can help troubleshoot these concerns. They can be reached either using the online chat function, on Greenworks Tools page, accessible by clicking “Chat with an Expert” in the bottom corner of your screen, Chat with a Live Agent I Monday - Friday: 9:30am – 5pm EST or by calling 1-888-909-6757 between 9AM and 7PM EST, M-F. So, our experts can discuss your experience; please have your unit, battery and charger with you along with the model and serial number to complete troubleshooting to ensure quick resolution is provided. *Hours are subject to change.